The official answer from TeamViewer is ‘ no‘. Without knowing the ID and password, it is not possible for others to access your computer.

In general, it is only possible to access your computer if you share your TeamViewer ID and the associated password with another person. Can someone access my computer if my TeamViewer is off? No incidents or maintenance related to this downtime. You can use the free version as long as you like to for non-commercial use, meaning forever. TeamViewer lets you remote in to computers or mobile devices located anywhere in the world and use them as though you were there. TeamViewer is a comprehensive, remote access, remote control and remote support solution that works with almost every desktop and mobile platform, including Windows, macOS, Android, and iOS. How did TeamViewer get on my computer? An attacker may have installed TeamViewer onto your machine either by using other malware, or persuading another user to install it themselves through social engineering. The connection will be terminated and you will not be able to reconnect. However, if you have any remote connections open when you uninstall TeamViewer. Hence, What happens if I Uninstall TeamViewer? If you uninstall TeamViewer, the program will be removed from your computer. Also, verify if your antivirus interferes in any way, by preventing the app from opening. To resolve the errors, make sure that your Windows Firewall is not blocking the software. Several causes, such as misconfigured settings or network issues, can lead to TeamViewer not working on Windows 10.

Teamviewer uninstall for mac